Packing-ring.



M, M. LLOYD.

y PACKING RING.

` APPLICIDN vFILED MAY 7|'1 913 -1',21"3,21,"` Patented Jan. 23,1911

MELVIN MARION LLOYD, 0F DESVMOINESY, IOWA.

PACKING-RING.

Specication of Letters Patent.

Patented J an. 23, 1917.

.application led Hay 7, 19,13. Serial' No. 766,081.

To all wiomV it may concern-.-

, Be it known that 1l, MELVIN MARION LLoro, a citizen er' the United States, residing at Des Moines, in the county of Cook and State ot Iowa, have invented certain new and useful Improvements in Packing- Rings, of which the following is a specifica-4 tion.

TheV present invention relates to packing rings for use on the pistons'of oil, gas or Steu'inengines to maintain at all times a. gasor vapor tight connection between the piston and the wall ot' the cylinder within which the piston slides.

More particularly the present invention aims to effect a tight packing of thevpiston without undue pressure on the wall of the cylinder or undue friction in the pistons movements while at the saine time a gas or vapor proof joint is maintained.

To this end, the packing ring of the present invention is made in two parts, onelying or seated within the other, each part heilig slit through to permit its expansion and contraction to facilitate installation of the rino on the piston and to compensate for wear and changes indiameter of the cylinder and the two inembersare so assembled H doni of motion.

` `of the eheapness of the material, and the simplicity of mechanical operations involved in the production and installation of the device.

4. The above and other features and advantages of the iniention will become apparent Vso from a detailed description of the accom-v panying drawings in which-- Figure 1 is, a perspective view of the packing ring before being placed in the' cylinder of a y'piston chamber. Fig. 2is a per- .eut across at 13 with a\diagona cylinder, and Fig. 6 is a cross-section of the paking ring on the line 6--6 of Figs. 1 an 4.

Q In the construction shown, .the complete packing ring is made up of two distinct members, a retaining member and a filling member. Both may be cast iron and both may be made up by ordinary machine Shop operations. The retaining ring- 1() is preferably turned up as a complete endless ring having a plain inner surface for contact with the bottom of a groove in the engine piston and having its outer face formed with two flanges 11 and 12 along the edgesI with a recess therebetween for the reception of the outer or filling!v member or ring. Ring ltlrafter being thus shaped u can be cut as shown in Fig. 5 and preferably, the width of the gap at 13 is such that when the packing ring is in use and has been expanded by the heat within the cylinder, the ends at 13 will just contact to form one continuous band. But even though there be a. gap at 13. the packing ring will still be eiective, for in use it is seated Well 'Within the usual annular groove of the piston head and furthermore, the gap at 13is in large measure protected and filled the inner or filling member or ring which will now be described.

Thelling ring 1l is rectangular in crosssection and may be made of cast iron and is of such size as 'to just fill therectangular groove formed in ring 10 between its annular flanges 11 and 12, the thickness of ring 14 being such that its outer face lies flush with the ianges 11 and 12. The gap or transverse cut 15 of the inner filling ring is diagonal as shwn in Fig. 5 but cuts sportive of the base member of the packingigfsuflicient clearance to permit it to be slid ring.- Fig. 3 is a perspective of the filling member in ring. Fig. l is an elevation showing the complete ring in posit-ion in a. cylinder. Fig. 5 is a plan view of a portion of the complete ring showing the respective positionsxvliich ma)y lie assumed yythe openings of` the rings when in 'position in a.

around as desired to properly position the diagonal cut 13 with respectA to cut 15. Fig. 4 illustratesv a proper relative position between the two gaps though. it will be understood that under the effect of heat in the cylinder.' these gaps may be substantially closed. Owing .to the'interlocked relation le -..MM

between the two members, and to the eective bearingr which each member has with the inner well of the'cylinder, there is no w-'irping of the rings from circular to oval shape and the wear on the cylinder is equally distributed throughout thecii-fcuniferenee of the piston and the bearingl faces or areas of contact between the piston and, cylinder are broad and extensive enough to insure even wear. lVith the en'ibodinient shown, the arrangement is such that substantially no vapor or gas can pass the ring either between the rings and the cylinder or through the openings or slits of the rings. Any tendency which the heat of the cylinder may have to distort the rings into oval shape of unequal pressure will be overcome by the interlocked relation of the rings :ind by the freedom with which the inner ring may be 'slid around into anydesired position with respect t0 the slot of'its supporting ring.

only one embodiment of the invention, it isto be understood that various changes and modlfieations may be mede by those skilled in the art Without departing from the scope rin;I sl'idabiy mountedv in sziid groove.

2. A packingring havingr an open base' ring, thedends of said base ring forming a diagonal siot, and an open filling ring adapted to sl1de on seid base ring the ends 'of said {lling ring also forming is. di"

Thilo there is herein shown and described slot, said slots when the. rings are asser running in opposite directions so the a tight connection is assured at elhtiines.

A pnckiiig ring having an'open baise ring, the ends of .sa-id base ring forming i diagonal slot, a groove in the cater peripheri7 of Asaid base ring, and anopen lilling, ring adapted to slide in said groeve, the ends of seid filling ring also form` ,ig it dingonei Slot, seid slots when the rn 'fs are assembled running' in opposite directions so. that a. tight connection is assure-d at eliS times. y

A packing ring having en open bese ring, n grod'fe in the outer peri'iiibery of said bese ringen and an open filling ring' slidably moiuited in said groove so that the openingsof the two rings een be positioned one hundred and eighty degrees avert thereby to eqiializ'. the pressure throughout the rings.

5. A packingr ringf eomprising ay one-piece expansible body portionj Split it one poinn said body portion being' provided in its outer surface with a groove. a, split experr sion ring slidably mounted in said groove,

all so constructed and arranged that it is impossible for said expansion ring t0 assume such a position with relation to said body portion that the joints between the endg cf said parts aline.

In witness whereof, I hereunto subscribe my name to this specification in, thev presence of two witnesses.

MELVIN MARION LLYD.

lVitncsses t" W. C. Laim, ANNA CGQK.

It is hereby certified that. in Letters Patent, No. 1,213,121?, granted Jnnnary 23, 1917r lllpon the application of Melvin Marion Lloyd, of Dee unirme, Iowa, for an improvement; inV `I ackiIig-Rings, au crm:- nppcrus in the printed specification rcqulrlng correction as follows: Page l, line 4, for the worde county of Cook" read county QI' Polk; and that the said Let-ters Patent should bc rond with this correction therein that the same may conform to the record of the casc in the' Patent, Office.

Signed and sealed this 6th dy of Murr-h, A. D., 1917.

I". W. H. CLAY, Acting Cmnmissiomr Qf Patents.

[SEAL] 

